Gas Turbine Engine Bearing
CageNitrided Steel 64
HRcNewall Jig BorerBoring 0.1mm per passTNMA 110304T DE DR-50100 m/min (330 ft/min)
cutting without coolant0.05 mm/rev (0.002”/rev)Must be better than 0.8
Ra (32 Cla)2 partsIt takes longer to load
the part than machine it as opposed to 1 Days grinding and there
is no danger of surface abuse.